How do you download cheat engine

You go to http://www.cheatengine.org.
Down the side click 'Downloads'
Now click 'Cheat Engine 5.6' and follow the on-screen instructions.

remember that most the servers are VAC secured and it gets patched almost every month so hacks get out dated and you will get caught. If you will be caught in VAC secured server you will be banned from all vac secured servers and you will not be able to play on them. You will need new steam account and repurchase the game again to play.